I don't know how it is for the Explorer as mine is a '22 and only 2 months old, but with my C7, it is VERY picky about the battery in the remote to operate properly or being "out of range" when your right next to it. For my C7, with the CR2032 battery goes down from 3v to like 2.7 or so, litterally bearly used, it starts acting up.
I would suggest replace the battery in your remote with a brand new, real name brand (Duracell/Energizer) battery, not a "cheap" (rayovac/Amazon/Kirkland (yes, kirkland might be a great battery, but sometimes these remotes can be very picky)/etc..) battery. If you have a 2020 or 2021 and haven't changed your battery ever in your remote, that would be my recommendation.